#!/usr/bin/env python3
"""
train_gnn.py
A placeholder showing how to convert process-tree graphs into graph data for GNNs.
This file is intentionally a template: to run a GNN you'll need torch and torch_geometric installed
and may need to adapt the node/edge features to your dataset.
"""
print('This is a GNN training stub. Install torch and torch_geometric and adapt dataset to run actual GNN training.')